DOCUMENT:Q162511 13-JUN-2001 [sna] TITLE :Calling CMSPTR over Thunking DLLs Causes Access Violation PRODUCT :Microsoft SNA Server PROD/VER:WINDOWS:2.11,2.11 SP1 OPER/SYS: KEYWORDS:kbnetworkkbbuglist ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft SNA Server, versions 2.11, 2.11 SP1 ------------------------------------------------------------------------------- SYMPTOMS ======== When a 16-bit CPI-C application calls uses the Set_Prepare_To_Receive_Type(cmsptr) application programming interface (API) while running over the 16-bit-to-32-bit CPIC thunking interface, the application terminates abnormally with an application error. CAUSE ===== The CPIC thunking interface was not handling this call correctly. In the thunking code, The Set_Prepare_To_Receive_Type(cmsptr) function is defined as: CallProcEx32W(4,0xF,(DWORD)lpfn32, (DWORD)pConvID,
(DWORD)pPTRType, (DWORD)pRetCode); The function should be: CallProcEx32W(3,0xF,(DWORD)lpfn32, (DWORD)pConvID,
(DWORD)pPTRType, (DWORD)pRetCode);< RESOLUTION ========== Apply the fix referenced below. STATUS ====== Microsoft has confirmed this to be a problem in SNA Server 2.11, 2.11 Service Pack 1 (SP1). A supported fix is now available for 2.11 SP1, but has not been fully regression-tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Technical Support for more information. Additional query words: ====================================================================== Keywords : kbnetwork kbbuglist Technology : kbAudDeveloper kbSNAServSearch kbSNAServ211 kbSNAServ211SP1 Version : WINDOWS:2.11,2.11 SP1 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.